CN217410275U

CN217410275U - Waste gas treatment system

Info

Publication number: CN217410275U
Application number: CN202221391948.0U
Authority: CN
Inventors: 游顺明; 林哲明
Original assignee: Zhangzhou Enyang Arts And Crafts Co ltd
Current assignee: Zhangzhou Enyang Arts And Crafts Co ltd
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-09-13
Anticipated expiration: 2032-06-06

Abstract

The utility model relates to an exhaust-gas treatment system relates to exhaust-gas treatment technical field, and it contains washing tower device, zeolite runner and heat accumulation oxidation unit, is provided with dry-type fiber filter between washing tower device and the zeolite runner, and the output of zeolite runner is connected on the heat accumulation oxidation unit, is connected with whirl board tower on the washing tower device, and the output of zeolite runner is connected with the chimney simultaneously, and the output of heat accumulation oxidation unit is connected on the chimney jointly. This application is through the processing mode who adopts "absorption concentration + oxidation technology", and the absorption concentration technology adopts zeolite runner structure, and oxidation technology adopts heat accumulation oxidation unit structure, can effectively change into after big amount of wind organic waste gas is concentrated little amount of wind, high concentration waste gas reentrant oxidation system oxidation degradation for carbon dioxide and water, and whole practicality is strong, has great market spreading value.

Description

Waste gas treatment system

Technical Field

The application relates to the technical field of waste gas treatment, in particular to a waste gas treatment system.

Background

Volatile organic waste gases (VOCs) mainly come from organic waste gases generated in the processes of spraying a mold release agent, spraying a mold primer, heating and the like, organic waste gases generated in the processes of injecting raw materials and foaming and forming, organic waste gases generated in the process of spraying paint (secondary paint) on the surface of a semi-finished product and the process of pad printing LOGO, and the like.

At present, volatile organic waste gases (VOCs) have the main characteristics of large air volume of waste gases, complex components, no recovery value and the like, and the traditional process route adopts an activated carbon adsorption-catalytic oxidation technology for adsorption concentration treatment.

Aiming at the related technologies, the VOCs waste gas concentration is high, the guarantee rate of the VOCs waste gas emission value treated by adopting activated carbon adsorption is low, meanwhile, the catalytic oxidation technology mainly adopts a heat accumulating type catalytic oxidation technology or a catalytic oxidation technology, corresponding catalysts are required to be added in the two oxidation technologies, the process oxidation can be influenced by the catalysts, and the catalysts need to be put into replacement cost for a long time.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems that the guarantee rate is low and a catalyst needs to be added for a long time due to the existing activated carbon adsorption-catalytic oxidation technology, the application aims to provide an exhaust gas treatment system.

In a first aspect, the present application provides an exhaust treatment system that employs the following technical solutions:

the utility model provides an exhaust-gas treatment system, contains washing tower device, zeolite runner and heat accumulation oxidation unit, be provided with dry-type fiber filter between washing tower device and the zeolite runner, the output of zeolite runner is connected on the heat accumulation oxidation unit, be connected with the whirl board tower on the washing tower device, the output of zeolite runner is connected with the chimney simultaneously, the output of heat accumulation oxidation unit is connected jointly on the chimney.

Through adopting above-mentioned technical scheme, adopt the processing mode of "adsorption concentration + oxidation technology" in this technique, the adsorption concentration technique adopts zeolite runner structure, oxidation technology adopts heat accumulation oxidation unit structure, heat accumulation oxidation unit need not to add the catalyst in the use, its oxidation behavior is not influenced, the change expense of no catalyst, cooperation through these two is used, it is higher to make VOCs exhaust emission value standard guarantee rate after the processing, can be effectively change into the little amount of wind after the concentration of big amount of wind organic waste gas, reentrant oxidation system oxidative degradation is carbon dioxide and water behind the high concentration waste gas.

Optionally, the washing tower device includes a first purification mechanism and a second purification mechanism, the first purification mechanism includes a plurality of first washing towers and a UV photolysis device, each first washing tower is correspondingly connected to one of the UV photolysis devices, and the UV photolysis device is connected to a front-end fan; the second purification mechanism comprises a second water washing tower, a front-end fan is also arranged on the second water washing tower, and the output ends of the first purification mechanism and the second purification mechanism are connected to the dry-type fiber filter in a unified mode.

By adopting the technical scheme, the waste gas sequentially flows into the corresponding washing tower through the first purification mechanism and the second purification mechanism under the action of the front-end fan to remove part of paint mist and dust in the waste gas, and the filtering and sterilizing effects are further enhanced through the corresponding UV photolyzer; and then the waste gas is collected and enters a dry type fiber filter to further remove impurities such as paint mist, dust and the like in the waste gas so as to ensure the purification efficiency and the service life of the zeolite rotating wheel.

Optionally, the whirl board tower contains tower body and header tank, be provided with absorption liquid entry and absorption liquid export on the tower body, still contain the blind plate in the tower body, be provided with the whirl board layer on the blind plate, the output orientation of absorption liquid entry the blind plate.

Through adopting above-mentioned technical scheme, contain paint mist and partial water solubility waste gas composition in the waste gas that the waste gas in considering the second purification mechanism produced, further get rid of the dirt miscellaneous material in the waste gas through newly-increased solitary spiral-flow plate tower, the absorption liquid entry is with liquid flow direction blind plate department.

Optionally, a plurality of tower plate blades are distributed on the cyclone plate layer at equal angles, an air inlet is formed in the bottom of the cyclone plate layer on the tower body, the input end of the air inlet is communicated with the output end of the second washing tower, a guide plate is arranged at the position, located on the tower arm, of the periphery of the cyclone plate layer, and a liquid collecting tank is formed on the guide plate.

Through adopting above-mentioned technical scheme, when waste gas flows into the tower through the air inlet during through the column plate blade on the whirl sheet layer, whirl sheet layer produces rotation and centrifugal motion, water liquid in the absorption liquid inlet passes through blind plate homodisperse to the column plate blade this moment, form thin liquid layer, form rotatory and centrifugal effect with rotatory ascending waste gas, spout into tiny liquid drop, get rid of to the tower wall, finally flow direction is by on the collecting tank that the guide plate formed, and follow up the layer absorption under the guide plate from the top in proper order, process water liquid finally collects on the header tank and outwards discharges by the absorption liquid export.

Optionally, the dry fiber filter is provided with tertiary filtration, contains coarse effect layer, well effect layer and high efficiency layer, coarse effect layer, well effect layer and high efficiency layer are in proper order horizontal distribution in proper order, coarse effect layer adopts anti cracked glass fiber filtration structure, the high efficiency layer adopts organic synthetic fibre and fine synthetic structure.

By adopting the technical scheme, the coarse effect layer adopts a fracture-resistant glass fiber filtering structure, the fibers are in a gradually increasing structure, the average capture rate of paint mist is up to more than 95%, and the temperature resistance is 80 ℃; the middle-effect layer and the high-effect layer are of a composite structure of organic synthetic fibers and micro fibers, the fibers are of gradually increasing fiber structures, the average capture efficiency is up to more than 99%, and the temperature resistance is 90 ℃.

Optionally, be equipped with adsorption zone, desorption district, cooling space and regeneration area in the zeolite runner, the input of adsorption zone is provided with front end filter and handles the fan, handle the fan with the front end filter is linked together, be provided with the concentrated runner of VOC on the adsorption zone, the outside of the concentrated runner of VOC is provided with gear motor, gear motor's drive end be provided with the connecting band with the concentrated runner of VOC rotates to be connected, the output of handling the fan is connected on the concentrated runner of VOC, the desorption district contains regeneration heater, the intercommunication has regenerator motor on the regeneration area.

By adopting the technical scheme, the waste gas passes through the preposed fiber filter under the action of the treatment fan and then is sent to the adsorption zone, the gear motor in the adsorption zone drives the VOC concentration rotating wheel to continuously rotate through connection, VOCs in the organic waste gas in the adsorption zone are adsorbed and removed by the VOC concentration rotating wheel, and the organic waste gas is purified and then is discharged to a chimney for discharge; VOCs adsorbed in the VOC concentration rotating wheel are desorbed and concentrated in a desorption area through a regeneration heater with small air volume at the temperature of about 200 ℃, and the concentration multiple is generally 5-25 times; the desorbed VOC concentration runner is cooled in a cooling zone, and the air passing through the cooling zone is used as regeneration air in a regeneration zone after secondary heating, so that the energy-saving effect is achieved.

Optionally, the zeolite rotating wheel is further connected with a heat exchanger.

Through adopting above-mentioned technical scheme, when waste gas reachd on the zeolite runner, realize in the cooling zone that the high temperature cooling is carried out behind the regenerative heater to waste gas, make the zeolite runner can adsorb organic component again, through setting up the heat exchanger, make the gas temperature reachd 200 ℃ and carry out the desorption again.

Optionally, a heat storage ceramic layer and a combustion chamber are arranged in the heat storage oxidation device, the combustion chamber is located at the output end of the heat storage ceramic layer, and the output end of the combustion chamber is connected to the chimney.

By adopting the technical scheme, high-concentration waste gas after the zeolite rotating wheel is desorbed enters the heat storage oxidation device, the waste gas is heated by the heat storage ceramic layer and then enters the combustion chamber, VOCs is decomposed into CO2 and H2O by high-temperature oxidation in the combustion chamber, heat is released to maintain the operation of the device, the high-temperature flue gas after combustion is about 800 ℃, the high-temperature flue gas flows through the heat storage ceramic layer again and then is discharged to a chimney, and the residual heat is transferred to the heat exchanger and is used for heating the inlet waste gas of the next cycle, so that the operation energy consumption is reduced.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by adopting a treatment mode of 'adsorption concentration + oxidation technology', the adsorption concentration technology adopts a zeolite runner structure, the oxidation technology adopts a heat storage oxidation device structure, and the combination of the two is used, so that the standard guarantee rate of the discharge value of the treated VOCs waste gas is higher, the treated VOCs waste gas can be effectively concentrated and converted into small air volume and high-concentration waste gas, and then enters an oxidation system to be oxidized and degraded into carbon dioxide and water, the whole practicability is strong, and the market popularization value is higher;

2. dust and impurity substances in the waste gas are further removed by adding an independent cyclone plate tower;

3. residual paint mist, dust and the like in the waste gas can be effectively removed by arranging the three-stage dry fiber filter;

4. the heat storage oxidation device is used for repeatedly carrying out heat exchange, so that the fuel consumption of waste gas heating is saved, the running cost is reduced, and the economic benefit is realized while the environment-friendly goal is met.

Drawings

FIG. 1 is a schematic diagram of the overall system structure of embodiment 1 of the present application;

FIG. 2 is a schematic structural view of a cyclone plate tower in example 1 of the present application;

FIG. 3 is a schematic structural view of a dry fiber filter according to example 1 of the present application;

FIG. 4 is a schematic view of the structure of a zeolite rotor in example 1 of the present application.

Description of reference numerals:

100. a water wash column unit; 110. a first purification mechanism; 111. a first water wash column; 112. a UV photolyzer; 113. a front end fan; 120. a second purification mechanism; 121. a second water wash column;

200. a cyclone plate tower; 210. a tower body; 211. an absorption liquid inlet; 212. an absorption liquid outlet; 213. a blind plate; 214. a rotational flow plate layer; 215. an air inlet; 216. a baffle; 217. a liquid collecting tank; 220. a water collection tank;

300. a dry fiber filter; 310. a coarse effect layer; 320. a middle effect layer; 330. a high efficiency layer; 340. an online differential pressure transmitter;

400. a zeolite wheel; 410. an adsorption zone; 411. a front-end filter; 412. a processing fan; 413. a VOC concentration rotating wheel; 414. a gear motor; 415. a connecting belt; 420. a desorption zone; 421. a regenerative heater; 430. a cooling zone; 440. a regeneration zone; 441. a regenerative motor; 442. a heat exchanger;

500. a regenerative thermal oxidizer; 510. a heat-accumulating ceramic layer; 520. a combustion chamber;

600. and (4) a chimney.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

Example 1: referring to fig. 1, the exhaust gas treatment system includes a water scrubber 100, a dry fiber filter 300, a zeolite wheel 400, and a thermal storage oxidation apparatus 500, the water scrubber 100 includes a first purification mechanism 110 and a second purification mechanism 120, and the first purification mechanism 110 includes a plurality of first water scrubbers 111 and UV-photolyzers 112. According to actual requirements, in embodiment 1 of the present application, three first water washing towers 111 and three UV photolyzers 112 are provided, each first water washing tower 111 is equipped with one UV photolyzer 112, and the UV photolyzer 112 is connected to a front end fan 113 for controlling gas flow. The second purification mechanism 120 includes a second water washing tower 121, the second water washing tower 121 is synchronously communicated with a front end fan 113, a rotational flow plate tower 200 is arranged between the second water washing tower 121 and the corresponding front end fan 113, the dry type fiber filter 300 is arranged between the water washing tower device 100 and the zeolite rotating wheel 400, the output end of the dry type fiber filter 300 is connected to the zeolite rotating wheel 400, one output end of the zeolite rotating wheel 400 is connected to the thermal storage oxidation device 500, the other output end of the zeolite rotating wheel 400 is connected to the chimney 600, and the output ends of the thermal storage oxidation device 500 are connected to the chimney 600.

Referring to fig. 1 and 2, in particular, the cyclone plate tower 200 includes a tower body 210 and a water collection tank 220, wherein the tower body 210 is in a vertical structure, the water collection tank 220 is located at the bottom of the tower body 210, and the tower body 210 is in a hollow structure. The top of the tower body 210 is provided with an absorption liquid inlet 211, and the corresponding bottom is provided with an absorption liquid outlet 212. The middle part is provided with a vertical blind plate 213 in the tower body 210, the top of blind plate 213 is provided with whirl sheet layer 214, blind plate 213 control whirl sheet layer 214 makes rotary motion, the equipartition angle distributes on whirl sheet layer 214 has a plurality of column plate blades (not marked in the figure), there is the space between every column plate blade, the bottom that tower body 210 is located whirl sheet layer 214 is provided with air inlet 215, the input of air inlet 215 is linked together with the output of second scrubbing tower 121, the periphery of whirl sheet layer 214 is located tower arm department and is provided with guide plate 216, guide plate 216 is provided with a set of structure that is "eight" shape of falling, the centre department is formed with the catch basin 217.

When the waste gas flows into the tower through the gas inlet 215 and passes through the plate blades on the swirl plate layer 214, the swirl plate layer 214 rotates and centrifugally moves, and the water in the absorption liquid inlet 211 flows to the blind plate 213 and is uniformly dispersed on the plate blades to form a thin liquid layer. Meanwhile, the waste gas and the waste gas rotating upwards form rotating and centrifuging effects, are sprayed into fine liquid drops, are thrown to the wall of the tower, finally flow to a liquid collecting tank 217 formed by the guide plate 216, and are sequentially absorbed by the guide plate 216 from top to bottom in a layer-following manner. The process water eventually collects in the header tank 220 and is discharged to the outside through the absorption liquid outlet 212, and the exhaust gas effectively removes the residual paint mist, dust, etc. in the process.

Referring to fig. 1 and 3, the dry fiber filter 300 is provided with three stages of filtration, from left to right, of a coarse filter layer 310, a middle filter layer 320, and a high filter layer 330. The coarse effect layer 310 adopts a fracture-resistant glass fiber filtering structure, the fibers are in a gradually increasing structure, the average paint mist capturing rate is up to more than 95%, and the temperature resistance is 80 ℃; the middle-effect layer 320 and the high-effect layer 330 are of a composite structure of organic synthetic fibers and micro fibers, the fibers are of a gradually increasing fiber structure, the average capture efficiency is up to more than 99%, and the temperature resistance is 90 ℃. It should be noted that the filters of different grades are of modular design and are easy to assemble. And online differential pressure transmitters 340 are arranged at the front and the rear of the filter, so that the normal, safe and stable operation of the waste gas treatment system is ensured. When the pressure of the filtering system reaches a set alarm value, the alarm system sends an alarm signal, and the alarm signal is connected to the central control room to remind an operator to replace the filtering material.

Referring to fig. 1 and 4, the zeolite wheel 400 is provided therein with an adsorption zone 410, a desorption zone 420, a cooling zone 430, and a regeneration zone 440, and the exhaust gas sequentially circulates stepwise through the adsorption zone 410, the desorption zone 420, the cooling zone 430, and the regeneration zone 440. The input of adsorption zone 410 is provided with front end filter 411 and handles fan 412, handles fan 412 and is linked together with front end filter 411, is provided with the concentrated runner 413 of VOC on the adsorption zone 410, and the concentrated runner 413 of VOC is circular structure of connecing, and the outside of the concentrated runner 413 of VOC is provided with gear motor 414, and gear motor 414's drive end is provided with connecting band 415, and connecting band 415 is connected with the concentrated runner 413 of VOC rotation simultaneously.

The gear motor 414 in the adsorption zone 410 drives the VOC concentration rotating wheel 413 to continuously rotate through the connecting belt 415, the VOCs in the organic waste gas in the adsorption zone 410 are adsorbed and removed by the VOC concentration rotating wheel 413, and the organic waste gas is purified and then discharged to the chimney 600 to be discharged.

The desorption zone 420 comprises a regenerative heater 421, VOCs adsorbed in the VOC concentration rotating wheel 413 are desorbed and concentrated in the desorption zone 420 after being treated by the regenerative heater 421 with small air volume at about 200 ℃, and the concentration multiple is generally 5-25 times; the attached VOC concentration runner 413 is cooled in the cooling zone 430, the regeneration zone 440 is communicated with a regeneration motor 441, the regeneration motor 441 controls the air to continuously flow, and the air passing through the cooling zone 430 is heated for the second time and then used as the regeneration air, so that the energy-saving effect is achieved.

Referring to fig. 1, a heat exchanger 442 is further connected to the zeolite wheel 400, and when the exhaust gas reaches the zeolite wheel 400, high-temperature cooling of the exhaust gas after passing through the regenerative heater 421 is performed in the cooling zone 430, so that the zeolite wheel 400 can re-adsorb organic components. The desorption is carried out after the gas temperature reaches 200 ℃ by arranging the heat exchanger 442. Meanwhile, a heat storage ceramic layer 510 and a combustion chamber 520 are arranged in the heat storage oxidation device 500, the combustion chamber 520 is positioned at the top of the heat storage ceramic layer 510, the combustion chamber 520 serves as an output end of waste gas flowing through the heat storage ceramic layer 510, VOCs are oxidized and decomposed into CO2 and H2O at high temperature in the combustion chamber 520, and heat is released to maintain the operation of the device. The high-temperature flue gas after combustion is about 800 ℃, the high-temperature flue gas flows through the heat storage ceramic layer 510 again and is discharged to the chimney 600, and the residual heat is transferred to the heat exchanger 442 and is used for heating inlet waste gas of the next cycle, so that the operation energy consumption is reduced.

The implementation principle of the embodiment of the application is as follows: through the processing mode that adopts "adsorption concentration + oxidation technology", the adsorption concentration technology adopts zeolite runner 400, and the oxidation technology adopts heat accumulation oxidation unit 500, uses through the cooperation of these two for VOCs exhaust emission value standard guarantee rate after the processing is higher, reentrant oxidation system oxidative degradation is carbon dioxide and water after can effectively changing into little amount of wind, high concentration waste gas after the concentration of big amount of wind organic waste gas into.

The embodiments of the present invention are preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, wherein like parts are denoted by like reference numerals. Therefore, the method comprises the following steps: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An exhaust gas treatment system comprising a water scrubber device (100), a zeolite rotor (400) and a thermal storage oxidation device (500), wherein a dry fiber filter (300) is disposed between the water scrubber device (100) and the zeolite rotor (400), and an output end of the zeolite rotor (400) is connected to the thermal storage oxidation device (500), characterized in that: the water washing tower device (100) is connected with a cyclone plate tower (200), the output end of the zeolite rotating wheel (400) is connected with a chimney (600), and the output ends of the heat storage oxidation devices (500) are connected to the chimney (600) together.

2. An exhaust treatment system according to claim 1, wherein: the water washing tower device (100) comprises a first purification mechanism (110) and a second purification mechanism (120), wherein the first purification mechanism (110) consists of a plurality of first water washing towers (111) and UV photolyzers (112), each first water washing tower (111) is correspondingly connected with one UV photolysis equipment, and the UV photolysis devices (112) are connected with front-end fans (113); the second purification mechanism (120) comprises a second water washing tower (121), the second water washing tower (121) is also provided with a front end fan (113), and the output ends of the first purification mechanism (110) and the second purification mechanism (120) are connected to the dry-type fiber filter (300) in a unified manner.

3. An exhaust treatment system according to claim 2, wherein: cyclone plate tower (200) contain tower body (210) and header tank (220), be provided with absorption liquid entry (211) and absorption liquid export (212) on tower body (210), still contain blind plate (213) in tower body (210), be provided with cyclone plate layer (214) on blind plate (213), the output orientation of absorption liquid entry (211) blind plate (213).

4. An exhaust treatment system according to claim 3, wherein: a plurality of tower plate blades are distributed on the cyclone plate layer (214) at equal angles, an air inlet (215) is formed in the bottom, located on the cyclone plate layer (214), of the tower body (210), the input end of the air inlet (215) is communicated with the output end of the second washing tower (121), a guide plate (216) is arranged on the position, located on the tower arm, of the periphery of the cyclone plate layer (214), and a liquid collecting groove (217) is formed in the guide plate (216).

5. An exhaust treatment system according to claim 1, wherein: the dry-type fiber filter (300) is provided with tertiary filtration, contains coarse effect layer (310), well effect layer (320) and high efficiency layer (330), coarse effect layer (310), well effect layer (320) and high efficiency layer (330) are in proper order horizontal distribution in proper order, coarse effect layer (310) adopt anti cracked glass fiber filtration, high efficiency layer (330) adopt organic synthetic fiber and microfiber synthetic structure.

6. An exhaust treatment system according to claim 1, wherein: be equipped with adsorption zone (410), desorption district (420), cooling space (430) and regeneration area (440) in zeolite runner (400), the input of adsorption zone (410) is provided with front end filter (411) and handles fan (412), handle fan (412) with front end filter (411) are linked together, be provided with concentrated runner of VOC (413) on adsorption zone (410), the outside of concentrated runner of VOC (413) is provided with gear motor (414), the drive end of gear motor (414) be provided with connecting band (415) with concentrated runner of VOC (413) rotate to be connected, the output of handling fan (412) is connected on concentrated runner of VOC (413), desorption district (420) contain regeneration heater (421), the last intercommunication of regeneration area (440) has regeneration motor (441).

7. An exhaust treatment system according to claim 6, wherein: the zeolite rotating wheel (400) is also connected with a heat exchanger (442).

8. An exhaust treatment system according to claim 7, wherein: the heat-storage oxidation device (500) is internally provided with a heat-storage ceramic layer (510) and a combustion chamber (520), the combustion chamber (520) is positioned at the output end of the heat-storage ceramic layer (510), and the output end of the combustion chamber (520) is connected to the chimney (600).